Improved sash-support and fastener



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VANIA.

Letters Patent No. 70,593, dated November 5, 1867.

IMPROVED SASH-SUPPORT AND FASTENER.

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TO ALL WHOM IT MAY C O NCERN v V 4 I g 7 Be it known that we, Fnnwrcu R. 'Mrnnnn and EDWIN Pnnscorr, of Pittsburg, in the county of Allegheny, and State of Pennsylvania, have invented a new and useful Improvement in Winddw-Sash Lock and Supporter;

and we do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings, making a part of this specification, in which-- Figure 1 is an outside view of our improvcmenhsliowing ts'modeof operation, and one way of attaching ittothcsash.

Figure 2 is a side View, the outer plate being removed, of the devices we employ, in the position they occupy when not in operation, or when the sash is being raised or'lowcrcd and Figure 3 is a similar view, showing the position of the some devices when in operation.

Like letters of reference indicate like parts.

In constructing and using windows it is desirable to-providcth'cm with some device so that when closed they cannot be opened from without, and when desirable theyean-be' opened and kept open. 'Such a device should act both as a. lock andas a supporter; should be eapableiof being used on either the upper or lower sash, or on both, with equal facility and efliciency; should be simple in construction and operation, and of small cost.

,. The nature of our invention consists in'the construction of a window-sash lock and supporter adapted to meet all these requirements. I I h To enable others skilled in the art to make and use our invention, we will proceed to describe its construe tion and mode of operation.

a is the back and a the front pla-te, which form the box in which the lock and supporter work. Rigidly attached to either or both the plates a a though not a necessary part thereof, is the shank b. In these plates, by axles or pins 0 c, I pivot two eccentrics or cams, substantially of the shape shown in figs. 2 and 3, the lower one, at, being the supporter, and the upper one, ll, acting as a lock. The supporter d has a curved head, (1, so shaped that the radius of curvature, measured from the centre of motion 0, increases in length toward its lower end. The metal composing ,it is sof'disposell that the preponderance of weight is in the rear of the pin a, so that by the heavy end of the supporter-d the head e is brought into contact with the casingf of the window,

and in consequence of its eccentricity, as above stated, it acts as a supporter to the sash g, with increasing efficiency with every increaseof weight. The lock-cam d has its axis or centre of motion placed near its outer edge, so as to throw a great preponderance of metal in front of the rivet c, thus causing the face of the cam d to press forward automatically againstthe window-casing and as the radius of curvature of its face, 11160.8

nred from its centre of motion 0, increases upwards ,towards the top of the box, its force as a look, when resting against the casing f to prevent the upward motion of the sash g, issulliciently obvious; consequently, when left to themselves, the supporter d and lock d both fall automatically of their own weight against the casing f of thewindow, and prevent either an upward or downward motion. In order to avoid the necessity of any great enlargement of the rear portion of the lower cam d, and also to cause the-cams d and d to operate together, they are connected by a, projection, 0, in one, and a notch, it, in the other, so that the superior-gravity of the upper cam d causes the lower cuni d to rise, even if the rear part of the latter be not heavier than the forward part.

This construction and arrangement not only add greatly to the efiiciency of the sash-supporter, but also enable us to dispense with any projections other than the short levers h by which the cams are operated, or, in case we use the pin 2' for operating one of the cams, the projecting parts I; and k may be entirely omitted.

To raise or lower the window, we provide alever, it, attached to either the supporter d or the lock d, but usually the former, or, if the box a a be embedded in the sash g so that a -lever, it, cannot be conveniently worked, we provide a pin, 1', projecting through aslot, '1', in the outer plate a, such pin a being attached to either the supporter cl or'the lock cl, as above. The lock d has a notch, '11., in its outer and lower face to receive a projection, 0, corresponding thereto on the supporter d. Then, as the lever h or pin 1, israised, the head e of the supporter at will be thrown clear of the casing f, and at the same time the projecting lip 0, playing in the notch 01,, will raise the lock 01 upward and backward, freeing it from contact with the casing-.1

The window may be then raised or lowered at pleasure, and on arriving at the proper point the lever h or pin 1' may be dropped, and the supporter d and lock 01 will fall to their places and secure the windows, as above set forth.

The lever 71 or pin 2', whichever is employed, may be attached to eitherthe supporter bl or lock 01 at pleasure, and in the latter casetheir operation will be directly the reverse of that above described; nor do we limit ourselves to any particular form for the projection 0 or notch 72, provided that thereby the supporter (Z and lock (2 be so connected that the one which is operated by the lever h or pin t'shalloperate the other.

The advantages we claim are cheapness of construction, simplicity and ease of operation, freedom from liability to, get out of order, and the double automatic action described; also, that by the-use of the upper cams operating in connection 'with the lower earn, the sash may be supported and locked at any position without the use of any notches in the window i'ram'e to receive a supporting pawl or finger.

Hence, what we claim as our invention, and desire to secure by Letters Patent, is-

The upper cam d, in'combination with the lower cam tZ, so constructed, arranged, and connected, substantially as described, as to press against the rail or frame of the window in opposite directions by means of the weight of the upper cam, and thus lock and support the sash in any position in which it may be placed, while the depressing of the lower cam shall also raise the upper cam, and thus leave the sash free to be raised or lowered. i

Intestilnony whereof we, the said FEW-left R. MILLER and EDWIN PRESCOTT, have hereuntoset our hands in presence of I FENWICK R. MILLER,

EDWIN PRESOOTT. Witnesses Gso. Hi Cnmsrr, A. S. NICHOLSON. 

